. >>> side by side, president obama and hillary clinton sit down for their first joint interview. was it a passing of the torch? >> i don't think, you know, either he or i can make predictions about what's going to happen tomorrow or the next year. >> so whose idea was it? and was vice president biden watching? >>> and remembering whitney. whitney houston's mom opens up about details for the first time of her daughter's death and the questions she still wrestles with every day. a candid conversation with cissy houston "today," monday, january 28th, 2013. >> announcer: from nbc news, this is "today" with matt lauer and savannah guthrie, live from studio 1a in rockefeller plaza. >>> and good morning. welcome to "today" on a monday morning. i'm matt lauer. >> good morning, everyone. i'm savannah guthrie. just a terrible story out of brazil. that country is declaring three days of national mourning now for the victims of that deadly nightclub fire as the investigation gets under way. >> it's a huge tragedy. consider the loss of life. it was apparently started, that fire, by some kind